Respostas

2013-09-10T19:38:15-03:00
A) AB/25 x 3/5=
     5AB = 75
     AB = 75/5
     AB = 15 cm

B) h^2 = c^2 + c^2     ( ^ significa elevado a 2)
     25^2 = 15^2 + c^2
     625 = 225 + c^2
     400 = c^2
      c^2 = 400
      c = V400 ( esse V significa raiz quadrada)
      c = 20

C) 20/25 = 4/5  cos C
    15/20 = 3/4  tg C

D) 20/25 = 4/5 sen B
    15/25 = 3/5 cos B
    20/15 = 4/3 tg   B
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